Xp Gain in Twilight Perion

I apologize for making one of these threads, but there's an argument I'm trying to win.
I'm also very curious.

A couple of friends and I have been chatting about the new Twilight Perion area coming up in the new Unleashed update, and I'd really appreciate some help on this (Hopefully from people who have actually experienced it already in KMS). In the update notes posted

So let's say you had a party of 6 people, including the necessary HS.
255,649 x 2.5(Because of the +50% xp per party member) = 639,122.5
Then 639,122.5 x 1.5(Because of HS) = 958,683.75 (Please correct me if I did that wrong )

On an average day, with no 2x coupons or event 2x, you're getting nearly 1million experience per kill!
But what shocks me the most about this, is that all the golems in the video are easily being killed in one hit.
I was told that they have incredibly low hp (About 500k), but is that really true?